Smoke preventer or consumer.



Patented 0ct. 9, |900.

-J. A. BECK. SMOKE PBEVENTER 0B GONSUMEB,

(No Model.)

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No. 659,600. Patented Oct. 9, i900. J. A. BECK.

SMOKE PREVENTER 0R CONSUMER. (Applicziqn mad 'Dm- 2e, lees.)

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UNTTED STATES PATENT OFFICE.

.IOHN A. BECK, OF PITTSBURG, PENNSYLVANIA.

SMOKE PREVENTER OuR CONSUMER.

SPECIFICATION forming part 0f Letters Patent No. 659,600, dated October9, 1900.

To a/ZZ whom, t may concern:

Beit known that I, JOHN A. BECK, a citizen of the United States ofAmerica, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in SmokePreventers or Consumers; and I do hereby de- Clare the following to be afull, clear, and eX- act description thereof, reference being had to theaccompanying drawings, which form a part of this specification.

My invention relates to an improved smoke preventer or consumer; and itconsists in a means for automatically supplying air and reverberatoryheat equally and evenly over the top surface of the burning fuel,thereby furnishing oxygen to consume the gases arising fromfreshly-introduced fuel, together with the certain details ofconstruction and combination of parts, as will be fully dev scribedhereinafter.

In the accompanying drawings, Figure 1 is a side sectional elevation ofa boiler-furnace provided with my improved smoke preventer or consumer,which is constructed and arranged in accordance with my invention. Fig.2 is a front sectional elevation of the same, the said section beingtaken on the line X X of Fig. l. Fig. 3 is a front view of the setting,showing the means for automatically opening and closing the dampers bymeans of the fire-doors. Fig. 4 is a perspective view of one of the archtile forminga roof over the fire-chamber. Fig. 5 is a sectionalelevation of the cylinder used as a means for preventing the abruptclosing of the dampers. Fig. 6 is an inverted plan View of the same.Fig.-

7 is a plan view of the cylinder, showing the Vabre-opening andperforations, the one to admit air to the cylinder and the other topermit the same to gradually escape.

To put my invention into practice with a boiler or other furnace, thesaid boiler-furnace consisting of the side walls or setting 3, afire-chamber, the grate-bars 4, the bridgewall 5, the ash-pit 7, theboiler 1, and stack 2, and other well-known and common features notnecessary to describe, I form in the side walls 3 and at either side ofthe fire-chamber fines 10, opening into the ash-pit 7, and the entranceS of each fitted with a swinging lid or damper 9. These dampers 9 aremounted door, thereby opening the'damper 9. 4upper ends of each of thesevertical levers 20 Application filed December 29, 1899. Serial No.741,939. (No model.)

upon a shaft 16, projecting outwardly to the front of the setting andthe inner ends of each fitted with a lever 18, upon which an adjustableweight 17 isplaced for the purpose of keeping the said dampers tightlyseated to exclude the air from the flues 10.

Arranged over the fire-chamber, at a point some distance above thegrate-bars 4, is an arch 12, constructed of tile, (see Fig. 4,) each ofwhich is formed with a series of perforations 14 and each provided withupwardlyprojecting flanges 15, located at either end thereof and uponwhich is arranged dat tile 13, thereby forming an air chamber orcompartment 11., which is in communication with the side flues 10. Thisarch 12, above described, extends from the front wall of the setting toa point at or near the bridge-wall 5 and is adapted to receive air fromthe ashpit and discharge the same through the perforations 14 upon thetop of the burning fuel in the re-chamber below.

Attached to the forward end of each of the damper-shafts 16 is a doubleor angular lever, the one arm 20 arranged in a vertical position andwithin reach of the fire-door 6 when open and is adapted to be movedabout its pivotal point by the movement of the are provided with aroller 2l to reduce the friction between the parts during contact withthe fire-door 6. The horizontal arm 19 of the angular levers is providedwith a tread -of the levers 19, in which are pistons 23, (see Figs. 5,6, and 7,) the said pistons being connected by rods 24 to the levers 19.The lower end of each of these cylinders 22 isopen and the upper endsclosed, and the said upper ends formed with openings 25, provided withflap-valves 26, and with a series of small perforations 27. Upon theopening of the dampers 9 the piston 23 is moved downward, the valve 25opening to fill the cylinder with air, and when the pressu/re/of thefire-door 6 is removed from the l ver 2O the weight 17 will force thepiston l23 upward, slowly eX- IOO pelling the air through the smallperforations 27, thereby keeping the damper open ashort time after thefire-door 6 has been closed to furnish air to fresh fuel thrown into thefur nace.

At each side of the fire-charnber and in communication with theair-fines 10 are openings 28, fitted with doors 29, which may be used tosupply air to the compartment l1 in pla-ce of the entrance 8, if it isso desired.

The arch l2 over the lire-chamber may be of any size or form and locatedat a convenient distance above the grate-bars 4.

On the opening of the iiredoor 6 the same is brought in contact with thelever 20, moving the same backward, thereby opening the damper 9. Thefuel is now thrown in and the fire-door 6 closed. The damper being stillopen will admit air to the compartment 11 and the draft from the stack 2draw the same forcibly downward through the perforatons 14, minglingwith the smoke and gases arising from the freshly-introduced fuel, and,aided by the reverberatory heat retlected from the arch 12, consume anyproducts of combustion and entirely eliminate any smoke. The timeoccupied in the closing of the dampers 9 is regulated by the size of thefurnace, and consequently the quantity of fuel added to the fire. Bythus introducing air upon the top of the re suicient oxygen isintroduced to consume the smoke, and before the dampers are closed acrust or coke is formed over the top of the fire which confines andburns the smoke particles.

Various changes may be made in the general details of constructionwithout depart-in g from the spirit of the invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a furnace, the combination, with the combustion chamber having aperforated cover and an air-space above said cover comm unicatin g withthe ash-pit beneath the combustion-chamber at opposite sides thereof, of

a pair of shafts arranged' in the ash-pit, a

swinging damper mounted on each of saidv shafts for closing the inletsto the air-space, an angular lever mounted on each of said shafts withits one arm arranged in a vertical position to be engaged by thefire-door of the furnace and its other arm extending normally in ahorizontal position, cylinders mounted at the front of the furnace,pistons operating in said cylinders with their rods connected to thehorizon tal arms of theangular levers, and means `whereby said pistonsare operated in a manner to obtain a gradual closing of the dampers, asand-for the purpose set forth and described.

2. In a furnace, the combination, with the combustion-chamber having anarched perf orated cover with an air-space labove the same and extendingdownwardly in the side walls of the furnace and communicating with thelash-pit beneath the combustion-chamber, of

the shafts `journaled within the ash-pit on opposite sides thereof,dampers mounted on said shafts for closing the inlets to the air-space,means mounted on the inner ends of said shafts for closing and retainingthe dampers in the closed position, angular levers mounted on the outerends of said shafts with one arm arranged vertically in proximity to thefiredoors and the other arm extending normally in a horizontal manner,rollers mounted on said vertical arms and adapted to be engaged by theIire-doors when the latter are opened, cylinders vmounted at the frontof the furnace, pistons operating in said cylinders with their rodsconnected to the horizontal arms of the angular levers, and meanswhereby said pistons are gradually operated when the firedoors areclosed to permit a gradual closing of the dampers, substantially asdescribed.

3. In combination, in a furnace, a combustion-chamber having aperforated cover and an air-space above said cover and in the side wallsof the furnace communicating with the ash-pit underneath thecombustion-chamber, shafts arranged within the ash-pit on 'oppositesides thereof, dampers mounted on the said shafts for closing the inletsto the air-space, weights mounted on the inner ends of said shafts forvclosing and retaining the dampers in the closed position, means mountedon the outer ends of the shafts and adapted to contact with thefire-doors of the furnace for automatically opening the dampers as thefiredoors are opened, and means connected to said shafts for resistingthe pressure of their weights when the fire-doors are closed to cause agradual closing of the dampers, as and for the purpose described and setforth.

In testimony whereof I have hereunto affixed my signature in thepresence of two sub-

